User`s manual

CYDAS UDR Library User’s Guide Analog Input Boards - UCDAS TC Series
68
UCDAS TC Series
Temperature Input
Temperature input functions and methods supported
UDR:
cbTIn(), cbTInScan()
UDR for .NET: TIn(), TInScan()
Temperature input argument values
Options NOFILTER
Scale CELSIUS, FAHRENHEIT, KELVIN
HighChan
0 to 15
Hardware considerations
Pacing input
The rate of measurement is fixed at approximately 25 samples per second.
Selecting thermocouples
J, K, E, T, R, S or B type thermocouples may be selected using InstaCal.
Open thermocouples
When using
cbTInScan() or TInScan() with the UCDAS TC, an open thermocouple error
(
OPENCONNECTION) on any of the channels will cause all data to be returned as –9999.0. This is a hardware
limitation. If your application requires isolating channels with defective thermocouples attached and returning
valid data for the remainder of the channels, use the
cbTIn() function or TIn() method instead.
To read the voltage input of the thermocouple, select
VOLTS for the Scale parameter in cbTIn() and
cbTInScan(), or TIn() and TInScan().